No. 2, Makch, 1921] PATHOLOGY 181 



1216. Anonymous. Control of silver blight. New Zealand Jour. Agric. 20:374-377. 

 1920.— The experiments deal principally with stone fruits. The treatments include tests 

 with a number of fertilizers, with lime, and with copper sulphate and Bordeaux mixture. 

 The only materials which appeared to be of any possible value were the copper sulphate 

 and the Bordeaux mixture. — A^. J. Giddings. 



1217. Anonymoits. Spraying calendar for apples in North Carolina. North Carolina 

 Agric. Ext. Service Circ. 101. 4 p. 1920.— Directions for spraying apples to prevent attacks 

 by insects and plant diseases. — F. A. Wolf. 



1218. Beck, Olga. Uber eine Methode der Saatgutuntersuchung auf Brand und iiber 

 das Versagen der Kuperfvitriolbeize. [A method of testing wheat for smut contamination and 

 possible omission of the blue vitriol disinfection.] Naturwiss. Zeitschr. Forst-u. Landw. 

 18 : 83-99. 1920.— The author describes an original method for determining arithmetically 

 the number of smut spores in any sample, and from this predicting the percentage of infection 

 likely to result in the subsequent crop. Under certain conditions seed treatment may be 

 safely omitted. — J. Rueser. 



1219. BiSBY, G. R., AND A. G. Tola as. The use of Bordeaux mixture for spraying pota- 

 toes. Minnesota Agric. Exp. Sta. Bull. 192. 31 p., 4 fig- 1920.— Bordeaux mixture is a pre- 

 ventive of late blight in potatoes. It also reduces the injury from other leaf diseases and 

 repels certain insects. A 5-5-50 mixture has been found better than weaker ones. The 

 indications are that spraying may result in the production of more vigorous tubers. — 

 .4. C. Amy. 



1220. Blair, R. E. The work of the Yuma reclamation project experiment farm in 1918. 

 U. S. Dept. Agric. Dept. Circ. 75. 77 p., 32 fig. 1920.— Preservative treatments for willow 

 posts. 



1221. Braun, Harry. Presoak method of seed treatment; a means of preventing seed 

 injury due to chemical disinfectants and of increasing germicidal efficiency. Jour. Agric. 

 Res. 19: 363-392. PI. 69-82. 9 fig. 1920.— Full experimental data in support of conclusions 

 previously published.— See Bot. Absts. 3, Entry 2576.— D. Reddick. 



1222. Bryce, p. I. Can we improve potato storage? Ann. Rept. Quebec Soc. Protection 

 of Plants 12: 53-59. 1920.— The article deals with statistics showing the importance of the 

 crop in Canada, the chief storage rots, and suggestions on storing potatoes both in small and 

 large lots. — B. T. Dickson. 



1223. Coons, G. H. Safeguarding next year's wheat. Michigan Agric. Exp. Sta. Quart. 

 Bull. 31:9-11. 1920. 



1224. Detwiler, Samuel B. White pine blister rust control in 1919. Amer. Plant Pest 

 Committee Bull. 4. 10 p. 1920.— A summary of the proceedings of the fifth annual Inter- 

 national Blister Rust Conference held at Albany, New York, on December 8-9, 1919. As 

 the result of four-years' field work it is now proved that white pine blister rust (Cronartium 

 ribicola) can be controlled locally if the currant and gooseberry bushes are destroyed within 

 200-300 feet of the pines. It has been proved that unskilled laborers with trained supervision 

 remove on the average 95 per cent of the bushes in the first working of an area. It has been 

 found that Ribes does not multiply rapidly in an eradication area, and a second eradication 

 does not seem necessary for five or ten years after the first. No new pine infections were 

 found in 1919 on four control areas carefully examined. The labor costs per acre for eradi- 

 cation in the New England States average between 24 and 42 cents. The number of pines 

 that are affected in the New England States is said to be increasing rapidly. On an area of 

 72 square miles in New Hampshire it was estimated that one-fourth of the pines are affected. 

 The Conference believes that it is necessary in the infected regions for white pine owners to 



